Role of Sodium Silicate in Formation of Magnesium Silicate Hydrate (M-S-H) for Magnesia Based Castables

摘要：

　　The activation performance of sodium silicate additive in the formation of M-S-H gels in MgO-SiO2 slurries and magnesia castables was evaluated by means of inductive couple plasma, X-ray diffraction,thermogravimetric measurement, FT-IR spectrometer.Based on the thermodynamic calculation, the increase in ions concentration can promote the formation of M-S-H gels in MgO-SiO2-H2O system.The results showed that sodium silicate additive enhanced the level of silicate ion concentration in this system and accelerated the dissolution of microsilica.As a result,the formation of M-S-H phases was promoted in MgO-SiO2 slurries in the presence of sodium silicate additive.The magnesia castables bonded by microsilica with addition of sodium silicate had better strength than ones without the addition.

关键词： magnesia castables sodium silicate M-S-H gels ion concentration

作者: ZHANG Yu LI Yawei SANG Shaobai

作者单位: The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China

会议类型: 国际会议

会议名称: 第七届国际耐火材料学术会议(ISR2016)

会议地点: 西安

会议语种:英文

页码: 1-5

在线出版日期: 2016-09-20（万方平台首次上网日期，不代表论文的发表时间）